Cowgill, 26, was originally drafted by the Diamondbacks before being sent to the A's in the Trevor Cahilltrade. He's a .255/.319/.311 hitter in 219 career big league plate appearances and a .315/.384/.482 hitter in 741 career Triple-A plate appearances. As a right-handed hitter with plenty of experience in all three outfield spots, Cowgill has a strong chance to open the season with New York.

Marte, 21, hit .251/.322/.366 in 513 plate appearances at the Double-A level in 2013, his first season above Single-A ball. Baseball America did not rank him as one of the Mets' top 30 prospects in their Prospect Handbook before the season, though he did rank 26th one year ago. Marte has spent the majority of his career at third base.